If it aint broke...
This game is CoD all over, refined and polished. If you have enjoyed the series so far then you WILL enjoy this. You wont be gobsmacked by innovation but its an improvement for me over Activisions MW2 in all departments. I like a good single player story, and am glad to say this is up there and possibly more fun than MW1. Coop (spec ops) is better than ever, in particular with the introduction of the levelling system and its enhancement of replayability. Online multiplayer is slightly deeper than previous incarnations, but as it was pretty 'one more go' to begin with it certainly aint broke!!
I dont feel ripped off (like some) for getting this game promply, I think it does exactly what it says on the tin. I do howerver think this series has virtually peaked in its current form, i just cannot see how they can significantly further it without putting in some dramatic changes in the future. I for one would like it to go a little more hardcore and less arcade, but I cant argue with its popularity in its current form.
Overall If you think you may enjoy this game I assure you that you will.